Furnace.



J. GAYGILL.l

FURNACB. APPLICATION FILED JUNB17,1908.

Patented Aug. 17. 1909.

2 SHEETS-SHEET 1.

J. GAYGILL.

FURNAC'B.

APPLICATION FILED JUNE17,1`908.

2 SHEETS-SHEET 2.

Patented Aug. 17, 1909.

lll-Inni .Illanvllnlllllul una.

III

l l m l m l I l l l I onv UNITED entre i ernten.

JOHN CAYGILL, OF RDGW-AY, PENNSYLVANIA.

FRNAGE.

lowing is a specification'.

The invention relates to an improvement in furnaces, beine' directedparticularly to a furnaceadaptedto supply fresh air in a heatedcondition to any desire-dpoint or points.

The nia'in 'objectof the present inventionl is the provision oi aheatingfurnace in which the fresh air is subjected to the lfull effect.of theheated products of combustion and collected for distribution aftersuch heating. Thev invention will be described in the following:specification, reference being had particularly to the, accompanying'drawings, in which Figurel is-a 'vertical section, partly in Velevation`ot a tui-nire constructed iii accordance with in v invention. Fig, 2 isa tron-t elevation ot' the saine7 partly in secvt'ion.. Fig, 3 is avertical section partly in elevationof a slightly modied forni offurnace and Fig. 4t' is a section on line 4 4 of Fig. 3.

v eferring' particularly to F l and 2 of the drawiiigs,'wherein is shownthe preferredlfoi'in Cif-details of structure, my iinfoi-nier.

proved furnace is constructed to provide a tire casing land an aircasing' the latter of which' is arrzhing'ed` in rear and above the Thefire easing l, which is construct-ed in any desired manner, as forenaniple of usual sheet metall to forni an approximately rectangularcasing' 'Within Wlticli at an appropriate heioht is arranged a grate orseries of gratestie interior of the casing' above Vthe grate forming thefire pot f4 and being suitably lined with refractory material 5 andprovided With the usual doors 6 for charging'purposes. The .interior 'ofthe casing -below the grate is adapted to provide the usual ash pit 7,'the forward Wall of which is provided with the :usual doors S. The aircasinor 2 is arranged in'rear ot' the tire casing', the rear Wall ofsaid latter casing being,l adapted to forni the forward wall of the aireasing. The air casing, which is ot' inat'eriall'y great/erdin'iensionsthan that oi' the fire casing, is arr: nged with its bottoniwall vLetters retenu Patented Aug, 17,`19o9.

1908. Serial N0. 438,959. l

ange-d to maintain that portion oi' the air 'desired elevation. The aircasing is divided by a transverse head plate 1-1 into two chambers, thelouer one l2 being,` hereinafter per .one 13 being hereinafter termedthe tresh air chamber. lrefter: bly the Wal-ls 'the adjacent edges 'ofwhich are provided with laterally 'projected flanges 14, between whichthe headplate 1i is secured.

cells- 15, which are in effect cylindrical bodies closed at their lowerends and open at their upper ends the edges of .the bodies adacent theirupper ends being formed with laterally projected flanges '1th whereby topriate intervals with 'opei'iing's 51T, andthe partiiailar cellsr arelwin-ed to the head plate in alinoinent .rith said openings, it beingunderstood in this. connection that the openings 1T and correspondingair cells may be the size of the head plate and controlled sired to heatina given time. The forward stated, is in coinuion with the fire casino,is formed with an opening 1? through Wiicli the products olfl combustionand heat. generated iu the tire casing pass to the air heating' latterchamber is preferably liu'ed with retractory material` as showuat' 1f).Anescape tiue is connected to the rear all of the air casingapproximately in horizontal aliiiei'aentiu'ith the opening i8, saidescape flue being in ccuaininication with the interior of the airheating chamber so that the products et' combustion are directedtransverse the chamber in the use of the furnace. By this iniliaationvof the products of conibustion the air cells 15, which are of ainahighly heated, as will be obvious.

fin air supply pipe ll is arranged lo supply the air casing,y with'fresh air.

appropriate pointin the length ot' the air supply pipe is arranged ablower or lan 22, .by which the air-is drawn in at one end of casingremote from the lire casing at;` `theet' the air easing are. forinedintwo sections,A

Secured to the head plate and depending within `the air heating chamber12 areair,

secure the cells to the underside Jai the head i plate.v The head plateis formed at appro-A ni any desired nun'iber,commensurate With wail ofthe' air casing. which, as before chamber l2. it beingr lunderstoodthat. the

9 on a plane above that of the grate in the tire casing, au auxiliarysupport 10 being artermed the air heating chamber-and the upsolely bythe' quantity ot' air which it is deterial having a lheat conductivity,become l'r an llU the pipe and forcedlengthwise into the air plate andextend at theirlower ends through I casing. At the inlet end of the pipe21, the bottom wall of the air casing, the lower which is preferablydisposed at a point ends of the pipe conduits 32 being freelyA readilyaccessible to fresh air, I arrange a open tothe atmosphere. As in thepreferred iilter box 23, preferably a rectangular strucforni the pipeconduits 32 are hi h y heated ture havin its forward wall and the forbythe products ofcombustion an the heated ward portions of its top andside walls -condition of lsaid ,pipes induces an 'air cirlwise'protected by screen material 25. Theand deliveredin a condition asfree omY forced into the lower ends the fire casing, it is obvious thatthe air lair supply pipe is led within the fresh air ber, as at'28, thedepending portion being livered from the feed sections, 30` .will also`become highly -finds its way supply sections 30 are dis ensed with, andin lieu f thereof the head l) y ,is provided' with a formed withopenings 24`covered or other-f circulation fresh airis drawn into thelower open ends of the conduits. It is, of course,

relativelyrear portions ofthesides and'top to be understoodj that inthis form'the pipe walls are solid and within the filter at a; pointapproximately in aline'ment with the forward edges of the solid portionsof the walls there is arranged a'transverse screen partition 26. Thatportion of the filter box inadvance of the screen partition is ill'edwith a filtering medium 27, as cottonwool, or other material which willseparate from the`air any foreign particles finding their way throughthe screen guards 25..' The air delivered to ;the air casing is thusiilteredl with the atmosp ere at any point remote from the furnace bysuitable extension of the conduits.

air of a fresh or oxygenated character'may be delivered from operationofthe latter. In this connection it is to be noted thattlie furnacewill,

d us't and foreign particles as possible. The be 'adapted'for supplyingfresh air of acomdepends within said chainm open communication wit pipes29, from which' depend feed sections 30, each of said o feed sectionsbeing disposed within one of the air cells 15, the llower open'end ofthe feedv section terminating slightly above the closed lower end of theaircel-l, The topof the air casing is provided with outletr pipesections31, which maybe arranged in any suitable number and which areadapted to receive the'pipe sections to lead the heated air to anydesired point or oints in use.

L In operation, in the ,fldrm of 4.furnace shown 1n Figs.v 1 and 2, th'efresh air filtered in the filter box 23-is by means of the fan 22. yofthe res ective air cel1sl5, and as thesemells. are hly heated by theproducts of combustion chamber 18 and the heat in the fire casing andeliverlng air under the pressure of the blower direct g to the point ofuse in the manner describe in connection with lthe heated air. Asidefrom the particulars noted the de.- -ta1ls of construction of myimproved furnace 'are immaterial, the material of which the of .thevarious parts being' controlled pri-I marily by the use for which theparticular furnace is intended and forming no`material v.parts ofthe'present invention.

Havin thus described the is claimed asnew, is

air casing 1n communication therewith, a head plate dividing said aircasing into an upper'and a lower chamber, air cells de vendomdechamber', said cells A lower ends'y and in communication with theheated. The air thus heated through the air cells inthe space surroundinthe Afeed sections 30 and is delivered direct y into the fresh air chamr13 4and from thence through the out. las 31. -In theform shown in Figs.3 vand 4 the construction is identical with that previously described inso far as the fire casinor 1 and air casingf2 are concerned, and themeans for dividing the body of air a plurality of streams within saidupper. chamber and deliverin each particular stream of air to one of saiair cells at a point adjacent their closed ends. j I i 2. Afurnace-,including'a fire casing, an .air

head plate dividing said air casing into an upper and la lowerchamber,air cells dedetails of construction' hereinbefore referred to,together with the'inumerals indicating -such details, are used iiiconnection with Figs. 3 and 4. this-instance', however, the airpipe'21,V the air cells 15, and the feed lower chamber, said cellsDbeing closedaat their lower endsand 'in communication with the upperchamber, and an 'air supply pi e for delivering air as a single streamto t e upper chamber and divdin it in said upper chamber intn a.plurality ogst'reams for devlivaiy to the respective'cells near theirclosed len s.; f

ate 11 of the air: casinglseries-of depending ipe conduits 3 2, whichcommunicate at t eir upper 'ends with the openings 17 in the headgf In'either construction `described. it is ob`-A vious that a constantsupply of high1yfheated..`

upper chainber,A and means fori delivering airV 1n a single stream tosaid upper chamber, and

'casing 1n communication therewith, a

culation toward the'- outlets 31, by which .I

con'duits 32 may "ifdesired, communicate Ithe furnace in the usual I Papticula-rly in the form shown in Figs. 1 and 2,'

paratively cool characterby. dis ensing with parts are1 constructed, orthe particular size invention what .1. A furnace including alfirecasinggy, an -I ing from 'said hea-d late within the ower eingclosed at theirars pending from said head plate ,within the Kohanlbei',said cells i y p y -lower ends and 1n eon'nnunieation with the A furnaceincluding a fire easing, an air casingl in connnunication therewith, ahead plaiedividing saidair 'casing into an upper and a lowerehamberfaircells depending from said head plate within thelower" chamber, saidcells ,being closed at their lower ends and in communicationi with theupper' chamber, 'an air supply pipe leading' into theupper chamber ofthe air casing and having a Iseries 'of depending feed sections arrangedrespectively in. the'air cells ang;A opening adjacent-the lower closedends o the latter, said air supply pipe and feed sections being inpartarranged within .the upper chamber to be initially heated therein.

4. A furnace including aire casing, an air casing incommunicatiomtherewith, a head plate dividing fsaid4 air casing into anupper and a lower chamber, air cells dependlate. Within the lower eingclosed at their ing from said head upper chamber, an air supply pipeleading into the upper chambr'of the air casing and having a series ofdepending feed sections arranged respectively in the air vcells andopening adjacentithe lower. closed ends of the latter, said air supplypipe and feed sec- `ti0nsbeing in part 'arranged within the `,upperehanjlbeiwto be initially heated the-rein, and a pressure means arrangedwithin said air pipe/ vj i y A 5. A furnace including a fire casing, anair casing in communication therewith, a head plate dividing said aircasinginto' an upper and a lower chamber, air cells depending 'from saidhead plate within the lower `chamber, said cells being ,closed at theirlower ends and in communication:with the upper chamber, an air supplypipe leading Ronrn'r HENRIY Coornn.

into the upper chamber of the upper casing

